{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology handle exception processing?","a":"Data cannot be tampered with: Each block contains the hash value of the previous block. This mechanism ensures that once data  is entered into the blockchain, it cannot be altered or deleted without leaving a trace. Therefore, it is difficult for attackers to tamper with the data in the blockchain system."}]}],"pr":"b0eea90cc3abe086ae9f7baffc6aca1bbd7f90399b86de8dbc0a8a6c053dc935"}